Unnatural phenomena

Valley of the Headless Men
nahanni valley

A creepy place littered with corpses! A mysterious valley where people wind up missing their heads! And more!
The Short Version
The Long and Fantastic Version

Japanese Suicide Forest
suicide forest

Legend has it that people who hope to end their lives are drawn to the Aokigahara forest at the base of Mt Fuji in Japan. The number of people who have died in the forest is so high that the Government organizing search parties annually, sometimes finding more than 100 bodies.
The Vice article
More images (careful, these could be disturbing)

Canneto di Caronia
Canneto fires

A small Italian village began experiencing spontaneous combustion in January 2004. Appliances, furniture, cars, and even water pipes are randomly catching on fire for no discernible reason.
The story
The Volcanoes